ref: bfe9da47cfa2f51ebef78c59332b5ba2deba306d
dir: /third_party/boringssl/src/crypto/fipsmodule/digest/digest.c/
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#include <openssl/digest.h>
#include <assert.h>
#include <string.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include "internal.h"
#include "../../internal.h"
int EVP_MD_type(const EVP_MD *md) { return md->type; }
int EVP_MD_nid(const EVP_MD *md) { return EVP_MD_type(md); }
uint32_t EVP_MD_flags(const EVP_MD *md) { return md->flags; }
size_t EVP_MD_size(const EVP_MD *md) { return md->md_size; }
size_t EVP_MD_block_size(const EVP_MD *md) { return md->block_size; }
void EVP_MD_CTX_init(EVP_MD_CTX *ctx) {
OPENSSL_memset(ctx, 0, sizeof(EVP_MD_CTX));
}
EVP_MD_CTX *EVP_MD_CTX_new(void) {
EVP_MD_CTX *ctx = OPENSSL_malloc(sizeof(EVP_MD_CTX));
if (ctx) {
EVP_MD_CTX_init(ctx);
}
return ctx;
}
EVP_MD_CTX *EVP_MD_CTX_create(void) { return EVP_MD_CTX_new(); }
int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) {
OPENSSL_free(ctx->md_data);
assert(ctx->pctx == NULL || ctx->pctx_ops != NULL);
if (ctx->pctx_ops) {
ctx->pctx_ops->free(ctx->pctx);
}
EVP_MD_CTX_init(ctx);
return 1;
}
void EVP_MD_CTX_free(EVP_MD_CTX *ctx) {
if (!ctx) {
return;
}
EVP_MD_CTX_cleanup(ctx);
OPENSSL_free(ctx);
}
void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx) { EVP_MD_CTX_free(ctx); }
int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, uint8_t *out, size_t len) {
OPENSSL_PUT_ERROR(DIGEST, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
uint32_t EVP_MD_meth_get_flags(const EVP_MD *md) { return EVP_MD_flags(md); }
void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags) {}
int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) {
// |in->digest| may be NULL if this is a signing |EVP_MD_CTX| for, e.g.,
// Ed25519 which does not hash with |EVP_MD_CTX|.
if (in == NULL || (in->pctx == NULL && in->digest == NULL)) {
OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_INPUT_NOT_INITIALIZED);
return 0;
}
EVP_PKEY_CTX *pctx = NULL;
assert(in->pctx == NULL || in->pctx_ops != NULL);
if (in->pctx) {
pctx = in->pctx_ops->dup(in->pctx);
if (!pctx) {
OPENSSL_PUT_ERROR(DIGEST, ERR_R_MALLOC_FAILURE);
return 0;
}
}
uint8_t *tmp_buf = NULL;
if (in->digest != NULL) {
if (out->digest != in->digest) {
assert(in->digest->ctx_size != 0);
tmp_buf = OPENSSL_malloc(in->digest->ctx_size);
if (tmp_buf == NULL) {
if (pctx) {
in->pctx_ops->free(pctx);
}
OPENSSL_PUT_ERROR(DIGEST, ERR_R_MALLOC_FAILURE);
return 0;
}
} else {
// |md_data| will be the correct size in this case. It's removed from
// |out| so that |EVP_MD_CTX_cleanup| doesn't free it, and then it's
// reused.
tmp_buf = out->md_data;
out->md_data = NULL;
}
}
EVP_MD_CTX_cleanup(out);
out->digest = in->digest;
out->md_data = tmp_buf;
if (in->digest != NULL) {
OPENSSL_memcpy(out->md_data, in->md_data, in->digest->ctx_size);
}
out->pctx = pctx;
out->pctx_ops = in->pctx_ops;
assert(out->pctx == NULL || out->pctx_ops != NULL);
return 1;
}
void EVP_MD_CTX_move(EVP_MD_CTX *out, EVP_MD_CTX *in) {
EVP_MD_CTX_cleanup(out);
// While not guaranteed, |EVP_MD_CTX| is currently safe to move with |memcpy|.
OPENSSL_memcpy(out, in, sizeof(EVP_MD_CTX));
EVP_MD_CTX_init(in);
}
int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) {
EVP_MD_CTX_init(out);
return EVP_MD_CTX_copy_ex(out, in);
}
int EVP_MD_CTX_reset(EVP_MD_CTX *ctx) {
EVP_MD_CTX_cleanup(ctx);
EVP_MD_CTX_init(ctx);
return 1;
}
int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *engine) {
if (ctx->digest != type) {
assert(type->ctx_size != 0);
uint8_t *md_data = OPENSSL_malloc(type->ctx_size);
if (md_data == NULL) {
OPENSSL_PUT_ERROR(DIGEST, ERR_R_MALLOC_FAILURE);
return 0;
}
OPENSSL_free(ctx->md_data);
ctx->md_data = md_data;
ctx->digest = type;
}
assert(ctx->pctx == NULL || ctx->pctx_ops != NULL);
ctx->digest->init(ctx);
return 1;
}
int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) {
EVP_MD_CTX_init(ctx);
return EVP_DigestInit_ex(ctx, type, NULL);
}
int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) {
ctx->digest->update(ctx, data, len);
return 1;
}
int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, uint8_t *md_out, unsigned int *size) {
assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
ctx->digest->final(ctx, md_out);
if (size != NULL) {
*size = ctx->digest->md_size;
}
OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
return 1;
}
int EVP_DigestFinal(EVP_MD_CTX *ctx, uint8_t *md, unsigned int *size) {
(void)EVP_DigestFinal_ex(ctx, md, size);
EVP_MD_CTX_cleanup(ctx);
return 1;
}
int EVP_Digest(const void *data, size_t count, uint8_t *out_md,
unsigned int *out_size, const EVP_MD *type, ENGINE *impl) {
EVP_MD_CTX ctx;
int ret;
EVP_MD_CTX_init(&ctx);
ret = EVP_DigestInit_ex(&ctx, type, impl) &&
EVP_DigestUpdate(&ctx, data, count) &&
EVP_DigestFinal_ex(&ctx, out_md, out_size);
EVP_MD_CTX_cleanup(&ctx);
return ret;
}
const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) {
if (ctx == NULL) {
return NULL;
}
return ctx->digest;
}
size_t EVP_MD_CTX_size(const EVP_MD_CTX *ctx) {
return EVP_MD_size(EVP_MD_CTX_md(ctx));
}
size_t EVP_MD_CTX_block_size(const EVP_MD_CTX *ctx) {
return EVP_MD_block_size(EVP_MD_CTX_md(ctx));
}
int EVP_MD_CTX_type(const EVP_MD_CTX *ctx) {
return EVP_MD_type(EVP_MD_CTX_md(ctx));
}
int EVP_add_digest(const EVP_MD *digest) {
return 1;
}